​Air Compressor Piston Rings with PermaSeal® Technology

Grover Corporation is a leading manufacturer of taper face Permaseal® rings for the air and gas compressor market. Our unique taper face Permaseal® provides high unit loading against the cylinder wall which ensures quick ring sealing and superior oil control.

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  • Grover produces a wide variety of gas and air compressor piston rings in conjunction with customized order management, delivery and packaging to meet your specific requirements.
  • Sizes range from 7/8 of an inch (22.23 mm) in diameter to over 36 and a half inches (927.1 mm) in diameter.
  • Grover provides quality products for leading manufacturers worldwide in the following industries: Reciprocating Compressors, Climate Control Systems, Vacuum Pumps, Air Treatment, Gas Processing, Natural Gas Processing and Power Generation.


  • Manufactured of piston ring grade cast iron and other materials for performance designed for your specific application.
  • Reduces oil bypass down to 2 particles per million.
  • Precision machined for consistent performance.
  • Superior CNG sealing capabilities.

We make a living by what we get, but we make a life by what we give.

- Winston Churchill

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Industries We Serve

Grover provides quality products for leading manufacturers worldwide.

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    ​Climate Control
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    ​Vacuum Pumps
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    ​Gas Processing
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    ​Power Generation
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    ​Air Treatment